261047678 has 16 divisors (see below), whose sum is σ = 398162304. Its totient is φ = 128334360.

The previous prime is 261047671. The next prime is 261047687. The reversal of 261047678 is 876740162.

261047678 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261047671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85193 + ... + 88203.

It is an arithmetic number, because the mean of its divisors is an integer number (24885144).

Almost surely, 2^261047678 is an apocalyptic number.

261047678 is a deficient number, since it is larger than the sum of its proper divisors (137114626).

261047678 is a wasteful number, since it uses less digits than its factorization.

261047678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 261047678 is about 16156.9699510768. The cubic root of 261047678 is about 639.1065642223.

The spelling of 261047678 in words is "two hundred sixty-one million, forty-seven thousand, six hundred seventy-eight".